CN111371249A

CN111371249A - Rotating device

Info

Publication number: CN111371249A
Application number: CN202010193401.9A
Authority: CN
Inventors: 松村行真
Original assignee: MinebeaMitsumi Inc
Current assignee: MinebeaMitsumi Inc
Priority date: 2016-06-17
Filing date: 2017-06-13
Publication date: 2020-07-03
Anticipated expiration: 2037-06-13
Also published as: JP2017225296A; US10836237B2; US20210016633A1; CN107528416B; CN111384816B; JP6422190B2; US20170361681A1; US20230001768A1; CN107528416A; CN111371248A; DE102017113093A1; CN111371249B; CN111371248B; US11472267B2; US11820204B2; CN111384816A

Abstract

The invention provides a rotating device. The rotating device (10) comprises a motor (30), a plurality of gears (60) including an output gear for outputting the rotation of the motor to the outside, and a housing (20) for accommodating the plurality of gears and the motor, wherein the housing comprises a 1 st surface part (21), a 2 nd surface part (25) which is opposite to the 1 st surface part and is arranged separately from the 1 st surface part, at least one of the 1 st surface part and the 2 nd surface part is provided with an opening part opposite to the output gear, a plurality of 1 st vibration attenuation parts and a plurality of 2 nd vibration attenuation parts, the 1 st vibration attenuation part is a projection part extending along the direction crossing with the rotating shaft of the motor, the plurality of 2 nd vibration attenuation parts surround the opening part, the plurality of 2 nd vibration attenuation parts are projection parts respectively projected from the at least one surface part, and the 2 nd vibration attenuation part is longer than the 1 st vibration attenuation part in the rotating shaft direction of the gear, the plurality of protruding portions are respectively mounted with a mounting member.

Description

Rotating device

The present application is a divisional application of patent applications having application number of 201710441893.7, application date of 2017, 6 and 13, and invented name of a rotating device.

Technical Field

The present invention relates to a rotary device.

Background

For example, patent document 1 discloses a motor actuator (rotating device) for driving a plurality of doors (dampers) provided in an air passage through which air of an air conditioning system for a vehicle flows.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-220969

Disclosure of Invention

On the other hand, in recent years, the vehicle interior environment tends to be improved in quietness, and in vehicles driven by a motor such as an electric vehicle, the quietness in the vehicle interior is significantly improved because noise generated by the internal combustion engine does not appear.

When the quietness is improved in this way, even a sound which is not so noticeable in a vehicle interior of an automobile in which the internal combustion engine is mounted becomes noticeable in the vehicle interior, and therefore, it is considered that various parts are required to have quietness higher than before.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a rotating device with improved quietness.

In order to achieve the above object, the present invention is achieved by the following configurations.

(1) The rotating device of the present invention includes: a motor; a plurality of gears including an output gear that outputs rotation of the motor to the outside; and a housing accommodating the plurality of gears and the motor; the housing includes: 1 st face; a 2 nd face portion that is provided opposite to the 1 st face portion and apart from the 1 st face portion; and a side wall portion provided on outer peripheral portions of the 1 st surface portion and the 2 nd surface portion, for supporting the 1 st surface portion and the 2 nd surface portion separately from each other; a vibration damping portion is provided at a position corresponding to the output gear of at least one of the 1 st surface portion and the 2 nd surface portion.

(2) In the configuration of the above (1), the vibration damping portion is a protruding portion provided to protrude from the face portion toward the inside of the case, and the protruding portion increases the weight of the face portion.

(3) In the configuration of the above (2), the protruding portion is a plurality of protruding portions formed to protrude from the face portion toward the inside of the case.

(4) In the structure of the above (2), the protruding portion is a mounting member mounted so as to protrude from the face portion toward the inside of the housing.

(5) In the structure of the above (4), the housing is formed of a resin material, and the mounting member is formed of a metal material.

(6) In the structure of any one of the above (2) to (5), the output gear has a recess, and a part of the protruding portion is accommodated in the recess of the output gear.

(7) In the configuration of the above (1), an opening is provided in the face portion at a position facing the output gear, the vibration damping portion is a cylindrical wall portion that increases the weight of the face portion, the cylindrical wall portion is formed to protrude from the face portion toward the inside of the housing, and the cylindrical wall portion surrounds the opening.

(8) In the configuration of the above (7), the cylindrical wall portion is a 1 st wall portion, the face portion has a 2 nd wall portion surrounding the opening portion, the 2 nd wall portion is cylindrical, the 2 nd wall portion is surrounded by the 1 st wall portion, and the face portion is formed with a plurality of ribs connecting the 1 st wall portion and the 2 nd wall portion.

(9) In the structure of any one of the above (1) to (8), the vibration damping portion is a wall-thickness-increased portion that increases the weight, and the wall-thickness-increased portion is formed by increasing the wall thickness relative to the basic wall thickness of the face portion.

(10) In the structure of the above (9), the increased wall thickness portion is formed to increase the wall thickness from the surface portion toward the outside of the case.

According to the present invention, a rotating device with improved quietness can be provided.

Drawings

Fig. 1 is a view of a rotating device according to embodiment 1 of the present invention, where (a) is a perspective view when the 1 st face side of a housing is viewed, and (b) is a perspective view when the 2 nd face side of the housing is viewed.

Fig. 2 is a perspective view of the rotating apparatus according to embodiment 1 of the present invention with the 1 st housing removed.

Fig. 3 is an exploded perspective view of the rotating apparatus according to embodiment 1 of the present invention.

Fig. 4 is a perspective view of the inside of the 1 st case according to embodiment 1 of the present invention.

Fig. 5 is a view for explaining embodiment 2 of the present invention, (a) is a perspective view when the inside of the 1 st case is viewed, (b) is a perspective view showing the mounting members constituting the vibration damping portion of embodiment 2 obtained by changing the 1 st vibration damping portion of embodiment 1, and (c) is a perspective view showing a state where a plurality of mounting members are mounted on the 1 st case.

Fig. 6 is a schematic diagram for explaining an air conditioning system including a rotating device according to an embodiment of the present invention.

Fig. 7 is a diagram showing a vehicle having the air conditioning system of fig. 6.

Description of the reference numerals

10: a rotating device; 20: a housing; 21: 1 st face; 21 a: a threaded engagement hole; 21 b: a rod-like protrusion; 22: a 1 st side wall portion; 23: 1, a first shell; 24: a sidewall portion; 25: a 2 nd face; 25 a: an opening portion; 25 aa: an opening wall portion; 26: a 2 nd side wall portion; 27: a 2 nd housing; 30: a motor; 31: a main body portion; 31 a: 1 st end face; 31 b: a 2 nd end surface; 35: a 2 nd connection terminal; 35 a: a connecting portion; 40: a transfer gear; 41: a worm gear; 42: a 1 st stage gear; 42 a: a gear having a large diameter; 42 b: a gear having a small diameter; 43: a second-stage gear 2; 43 a: a gear having a large diameter; 43 b: a gear having a small diameter; 50: an output gear; 51: a fastening part; 52: a recess; 60: a gear; 70: a sensor; 71: a base; 72: 1 st connecting terminal; 73: a sensor substrate; 74: a covering section; 80: a flexible printed circuit board; 81: a 1 st plane part; 81 a: 1 st clamping hole; 82: a 2 nd plane part; 82 a: a 2 nd engaging hole; 83: a middle planar portion; 83 a: a bent portion; 90: a vibration damping section; 91: a convex portion; 91': a mounting member; 91 a': pressing into the hole; 92: a screw; 93: a cylindrical wall portion; 93 a: a rib; 94: a wall thickness increasing portion; 95: a wall thickness increasing portion; 96: a rib; 100: an air conditioning system; 101: a fan; 102: an evaporator; 103: a heater;

104: a damper; 104 a: a rotating shaft; a, B, C, D: an installation part; e: a fitting portion; f: a fitted portion; FR: a head part.

Detailed Description

Hereinafter, a mode for carrying out the present invention (hereinafter referred to as "embodiment") will be described in detail with reference to the drawings.

In the entire description of the embodiments, the same elements are denoted by the same reference numerals.

(embodiment 1)

Fig. 1 is a view of a rotating device 10 according to an embodiment of the present invention, where (a) is a perspective view when viewing the 1 st surface portion 21 side of the housing 20, and (b) is a perspective view when viewing the 2 nd surface portion 25 side of the housing 20.

Fig. 2 is a perspective view of the rotating device 10 with the 1 st housing 23 removed, and fig. 3 is an exploded perspective view of the rotating device 10.

As shown in fig. 1, the rotating apparatus 10 includes: the 1 st face 21 as a face; a 2 nd face portion 25 as a face portion, which is provided opposite to the 1 st face portion 21 and apart from the 1 st face portion 21; and a side wall portion 24 provided on the outer peripheral portions of the 1 st and 2

nd face portions

21 and 25, for connecting or supporting the 1 st and 2

nd face portions

21 and 25 in a state where the 1 st and 2

nd face portions

21 and 25 are separated.

Specifically, as shown in fig. 2, the case 20 is configured by combining a 1 st case 23 and a 2 nd case 27, the 1 st case 23 includes a 1 st face portion 21 and a 1 st side wall portion 22, and the 1 st side wall portion 22 constitutes a part of a side wall portion 24 (see fig. 1) provided on an outer peripheral portion of the 1 st face portion 21; the 2 nd case 27 includes a 2 nd surface portion 25 and a 2 nd side wall portion 26, and the 2 nd side wall portion 26 constitutes a part of the outer peripheral portion of the 2 nd surface portion 25 of the side wall portion 24 (see fig. 1).

Further, the case 20 is formed of a resin material such as polypropylene, polyethylene terephthalate, ABS, or the like.

As shown in fig. 2 and 3, the rotating device 10 includes a motor 30 and a plurality of gears 60 as various components housed in the housing 20 (see fig. 1), and the plurality of gears 60 includes an output gear 50 that outputs the rotation of the motor 30 to an external machine.

Further, as shown in fig. 2 and 3, the rotating apparatus 10 includes a sensor 70, which is a variety of components housed in the housing 20 (see fig. 1), the sensor 70 detecting a rotation angle of the

output gear

50, 31 st connection terminals 72, 2 nd connection terminals 35, and a flexible printed circuit board 80 (see fig. 3); 31 st connection terminals 72 are provided on the base portion 71 of the sensor 70 for obtaining a rotation angle signal corresponding to the rotation angle; 2 nd connecting terminals 35 are provided on the base portion 71 of the sensor 70 for electrical connection with the motor 30; the flexible printed circuit board 80 is used to electrically connect 2 motor terminals (not shown) of the motor 30 and the 2 nd connection terminal 35.

(electric motor)

The motor 30 is a driving device for rotating the output gear 50, and a DC motor is used in the present embodiment.

As shown in fig. 3, the motor 30 includes: a body portion 31 having a quadrangular prism-like shape with curved corners; a rotary shaft (not shown) having a worm wheel 41, which is led out from the 1 st end surface 31a of the main body 31; a pair of motor terminals (not shown) for power supply are provided on the opposite side of the 1 st end surface 31a of the body 31 so as to protrude outward from the 2 nd end surface 31b opposite to the 1 st end surface 31 a. The worm wheel 41 is fixed to the rotation shaft.

The rotating shaft is fixed to the motor.

(transfer gear)

As shown in fig. 2 and 3, the plurality of gears 60 includes a transmission gear 40, and the transmission gear 40 is a gear for transmitting the rotation of the rotating shaft (not shown) of the motor 30 to the output gear 50 at a predetermined gear ratio, and in the present embodiment, 3 gears (the worm gear 41, the 1 st-stage gear 42, and the 2 nd-stage gear 43) are used as the transmission gear 40.

Specifically, as shown in fig. 2, the transmission gear 40 includes: a worm wheel 41 fixed to a rotation shaft (not shown) of the motor 30; a 1 st-stage gear 42 having a large-diameter gear 42a and a small-diameter gear 42b connected to the worm wheel 41; and a 2 nd-stage gear 43 having a large-diameter gear 43a connected to the small-diameter gear 42b of the 1 st-stage gear 42 and a small-diameter gear 43b connected to the output gear 50 (see fig. 3).

In the present embodiment, the 1 st stage gear 42 and the 2 nd stage gear 43 are used to transmit the rotation of the rotation shaft (not shown) of the motor 30 to the output gear 50 with a small space adjustment gear ratio, but for example, a design may be adopted in which the 2 nd stage gear 43 is omitted and the output gear 50 is connected to the gear 42b having a small diameter of the 1 st stage gear 42, or a design may be adopted in which the 1 st stage gear 42 and the 2 nd stage gear 43 are omitted and the output gear 50 is directly connected to the worm wheel 41.

(output gear)

The output gear 50 is connected to a drive shaft of a damper of an air conditioning system of a vehicle such as an automobile (not shown), and outputs rotation of a rotary shaft (not shown) of the motor 30 as a drive force for controlling the drive shaft of the damper.

Therefore, as shown in fig. 3, an opening 25a is provided in a portion of the 2 nd surface portion 25 of the 2 nd casing 27 corresponding to the center side of the output gear 50, and the output gear 50 is accessible from the outside through the opening 25a, and as shown in fig. 1 (b), the drive shaft of the damper, not shown, can be connected to the engagement portion 51 of the output gear 50 through the opening 25 a.

Further, the present invention is not limited to the form in which the drive shaft of the damper, not shown, is directly connected to the output gear 50, and a gear interposed between the rotary device 10 and the drive shaft of the damper, not shown, may be provided, and in this case, the rotary shaft of the interposed gear may be connected to the output gear 50.

(sensor)

For example, a damper (ルーバー) is provided in an air conditioner or the like mounted on an automobile.

In order to control the damper driving, not shown, to a predetermined state, it is necessary to control the rotation angle of the output gear 50, and the sensor 70 is a sensor for detecting the rotation angle of the output gear 50 in order to control the rotation angle of the output gear 50.

Then, by controlling the rotation of the motor 30 based on the rotation angle of the output gear 50 detected by the sensor 70, the output gear 50 is rotated so that the damper, not shown, is brought into a predetermined state.

In the present embodiment, a rotor type resistance position sensor is used as the sensor 70, and as shown in fig. 2 and 3, the sensor 70 includes: 31 st connection terminals 72 for input and output for obtaining a rotation angle signal corresponding to the rotation angle of the output gear 50; a sensor substrate 73 on which a resistor electrically connected to the 1 st connection terminal 72 is printed; a rotating body (not shown) having a conductive brush (not shown) in contact with the resistor and rotating integrally with the output gear 50 whose rotation angle is to be detected; a base 71 for disposing the above members; and a cover portion 74 provided at a position corresponding to a not-shown rotating body, and forming a sensor housing together with the base portion 71.

In addition to the 31 st connection terminals 72 for the sensor 70 for obtaining the rotation angle signal, 2 nd connection terminals 35 are disposed and fixed on the base portion 71, and the 2 nd connection terminals 35 are electrically connected to 2 motor terminals (not shown) of the motor 30 via a flexible printed circuit board 80 (see fig. 3).

When the 1 st connection terminal 72 and the 2 nd connection terminal 35 are integrally disposed and fixed on the base portion 71 of the sensor 70 in this way, the space can be effectively used, and therefore, the rotary device 10 can be downsized.

Further, by disposing the 1 st connection terminal 72 and the 2 nd connection terminal 35 on the base portion 71, it is possible to avoid contact between the 1 st connection terminal 72 and the 2 nd connection terminal 35 and other components accommodated in the housing 20 (see fig. 1), and to further improve reliability.

Further, the base portion 71 is simple in shape, and therefore, even if a structure for arranging and fixing the 1 st connection terminal 72 and the 2 nd connection terminal 35 is provided, the cost of a mold or the like for molding the base portion 71 does not increase.

On the other hand, since the housing 20 is formed with a structure for arranging various components, if a structure for arranging and fixing the 1 st connection terminal 72 and the 2 nd connection terminal 35 is further provided, a mold or the like for molding the housing 20 (the 1 st housing 23, the 2 nd housing 27) becomes complicated, and the cost of the mold or the like increases, thereby increasing the manufacturing cost of the housing 20.

Therefore, as in the present embodiment, the 1 st connection terminal 72 and the 2 nd connection terminal 35 can be arranged and fixed on the base portion 71 of the sensor 70, and the manufacturing cost can be reduced.

Further, as shown in fig. 2, in the present embodiment, since the 2 nd connecting terminal 35 is disposed on the base portion 71 so as to be positioned closer to the motor 30 than the 1 st connecting terminal 72, the wiring distance between the 2 nd connecting terminal 35 and the motor terminal (not shown) of the motor 30 can be shortened, and the electric wiring between the 2 nd connecting terminal 35 and the motor terminal (not shown) of the motor 30 can be made compact.

(1 st connection terminal and 2 nd connection terminal)

The 1 st connection terminal 72 and the 2 nd connection terminal 35 are connection terminals for connection with an external connector to be connected with the rotating apparatus 10.

The 31 st connection terminals 72 are electrically connected to a conductive portion (not shown) of the sensor substrate 73 for detecting the rotation angle of the output gear 50, and the 2 nd connection terminals 35 are electrically connected to 2 motor terminals (not shown) as power supply terminals of the motor 30 via a flexible printed circuit board 80 (described later).

As shown in fig. 2 and 3, the 2 nd connection terminal 35 has a connection portion 35a extending in a direction away from the base portion 71, and the connection portion 35a is formed as a bent portion in which one end side of the 2 nd connection terminal 35 opposite to the distal end side for connection with the external connector is bent in a direction away from the base portion 71, and by providing such a connection portion 35a, the reliability of electrical connection between the 2 nd connection terminal 35 and the flexible printed circuit board 80 can be improved as described later.

(Flexible printed Circuit Board)

As shown in fig. 3, the flexible printed circuit board 80 includes substantially 3 surfaces, and specifically includes a 1 st surface 81 on one end side connected to the 2 nd connection terminal 35, a 2 nd surface 82 on the other end side connected to a motor terminal (not shown) of the motor 30, and an intermediate surface 83 connecting the 1 st surface 81 and the 2 nd surface 82.

Further, the 1 st surface portion 81 is formed with 21 st engagement holes 81a which are engaged with the connection portions 35a of the 2 nd connection terminals 35, respectively, and the 2 nd surface portion 82 is formed with 2 nd engagement holes 82a which are engaged with a pair of motor terminals (not shown) of the motor 30, respectively.

Therefore, the connection portion 35a of the 2 nd connection terminal 35 is engaged with and soldered to the 21 st engagement hole 81a of the 1 st surface portion 81, whereby stable electrical connection can be performed, and therefore, connection failure can be suppressed.

Similarly, a pair of motor terminals (not shown) of the motor 30 are engaged with and soldered to the 2 nd engaging hole 82a of the 2 nd surface portion 82, whereby stable electrical connection can be made, and therefore, poor connection can be suppressed.

The 2 nd connecting terminal 35 and a motor terminal (not shown) of the motor 30 may be connected by a lead wire.

In addition, the flexible printed circuit board is better in handling than a lead wire and is less likely to be broken, and therefore, is better in connection workability.

On the other hand, when the flexible printed circuit board 80 is used as in the present embodiment, the wiring operability is improved, so that the manufacturing cost can be reduced.

In the present embodiment, as shown in fig. 3, a bent portion 83a is provided in an intermediate surface portion 83 of the flexible printed circuit board 80 that connects the 1 st surface portion 81 and the 2 nd surface portion 82, and the bent portion 83a is disposed so that the 1 st surface portion 81 and the 2 nd surface portion 82 are substantially orthogonal to each other.

The bent portion 83a is also shaped to have a folded structure.

For example, when the 2 nd connection terminal 35 and the motor terminal (not shown) of the motor 30 are linearly connected by the flexible printed circuit board 80, the motor 30 and the 2 nd connection terminal 35 vibrate due to the vibration of the vehicle, and at this time, the connection portion between the flexible printed circuit board 80 and the 2 nd connection terminal 35 and the connection portion between the motor terminal (not shown) and the flexible printed circuit board 80 are easily subjected to tensile stress or the like, and thus a connection failure is easily generated, or disconnection of the flexible printed circuit board 80 is easily generated.

Therefore, in the present embodiment, the 2 nd connecting terminal 35 is interposed with the folded portion 83a in the middle of the motor terminal (not shown) of the motor 30, and the folded portion 83a has a folded structure capable of exhibiting elasticity by changing an angle (bending angle) formed by the 1 st surface portion 81 and the 2 nd surface portion 82 in response to vibration or the like.

In this way, since the bent portion 83a provided with the folded structure is deformed to exhibit elasticity so as to change the bending angle in accordance with vibration or the like, it is possible to prevent the connecting portion between the 2 nd connection terminal 35 and the flexible printed circuit board 80 and the connecting portion between the motor terminal (not shown) and the flexible printed circuit board 80 from being subjected to tensile stress or the like, and it is possible to suppress occurrence of a connection failure and to suppress occurrence of disconnection or the like of the flexible printed circuit board 80 itself.

However, even if the bent portion 83a is formed by bending only once without a folded structure, a portion which is an extra length can be formed as compared with the case of the linear wiring, and the influence of tensile stress and the like can be reduced, and therefore, such a bent portion can be adopted.

On the other hand, in the case where the folded portion 83a having the folded structure is provided as in the present embodiment, the folded portion having the folded structure can be more hardly affected by tensile stress or the like.

Therefore, by providing the bent portion 83a having the folded structure on the flexible printed circuit board 80 as in the present embodiment, the reliability of the rotating device 10 can be improved.

Further, when the intermediate surface portion 83 is provided with the folded portion 83a having the folded structure as in the present embodiment, as is apparent from fig. 2 and 3, the conductive pattern formed on the flexible printed circuit board 80 is provided on the side from which the connection portion 35a of the 2 nd connection terminal 35 protrudes when the connection portion 35a passes through the 1 st engagement hole 81a, and on the side from which the motor terminal (not shown) protrudes when the motor terminal (not shown) passes through the 2 nd engagement hole 82a (see fig. 3), and therefore, there is an effect that the operability in soldering is improved.

(case)

As described above, the housing 20 is constituted by combining the 1 st housing 23 and the 2 nd housing 27.

Further, by examining the noise state at various places of the case 20, it is found that the vibration at the position corresponding to the output gear 50 of the 1 st and 2

nd face portions

21 and 25 is larger than the vibration at other places, which becomes a cause of the noise.

The positions of the 1 st and 2

nd face portions

21 and 25 facing the output gear 50 are considered to be positions where vibrations that cause noise are likely to be generated. The reason is as follows. The output gear 50 has a large size and cannot contact other members. The output gear 50 is disposed at the positions of the 1 st face portion 21 and the 2 nd face portion 25. There is no structure for suppressing vibration.

Therefore, the noise generated in the housing 20 is suppressed by providing the plurality of vibration damping portions 90 at the positions corresponding to the output gear 50 of the 1 st and 2

nd face portions

21 and 25 without preventing the rotation of the output gear 50, and the vibration damping portions 90 will be described in detail below.

Fig. 4 is a perspective view of the inside of the 1 st case 23.

In fig. 4, a region where the output gear 50 is located is schematically shown by a dashed line frame B.

(1 st vibration damping part)

As shown in fig. 4, a 1 st vibration damping portion 90 as a protruding portion is provided at a position corresponding to the output gear 50 (the periphery of the dashed line frame B) on the 1 st surface portion 21 as one surface portion of the housing 20 (see fig. 1), the 1 st vibration damping portion 90 is formed by a plurality of protruding portions 91, the plurality of protruding portions 91 are formed to protrude from the 1 st surface portion 21 as one surface portion toward the inside of the housing 20, and the 1 st surface portion 21 is supported in a cantilever manner.

The plurality of projections 91 are arranged in line along the direction of the rotation axis of the motor 30 or the direction intersecting the rotation axis.

The projection 91 is formed longer than the rib 96 formed on the case 20 in the thickness direction of the case 20, and has a rod-like outer shape.

Further, a plurality of ribs extending in the direction of the rotation shaft of the motor 30 or the direction intersecting the rotation shaft are formed on the inner surface of the 1 st surface portion 21 facing the 2 nd surface portion 25.

In this way, by providing the 1 st surface portion 21 of the housing 20 with the protruding portion formed by the plurality of protruding portions 91, the weight of the portion of the 1 st surface portion 21, which is one surface portion of the housing 20 (see fig. 1), corresponding to the output gear 50 (the periphery of the dashed-line frame B) is increased.

Therefore, even if the 1 st surface portion 21 of the casing 20 vibrates, the amplitude of the vibration is rapidly attenuated with the passage of time, and therefore, the generation of noise from the casing 20 can be suppressed, or the vibration can be suppressed from resonating with the vibration of other portions of the casing 20 other than the 1 st surface portion 21, and the noise can be reduced.

As can be seen from the broken line frame B, the protruding portion formed by the plurality of protruding portions 91 is located on the inner side of the output gear 50.

Therefore, as shown in fig. 2 and 3, a concave portion 52 is formed on a surface of the output gear 50 facing the 1 st surface portion 21.

The concave portion 52 receives the protruding portion while avoiding contact with the protruding portion formed by the plurality of convex portions 91.

The protruding portion formed by the plurality of protruding portions 91 is formed to protrude from the first surface portion 21 so that a part of the distal end side of the protruding portion formed by the plurality of protruding portions 91 is positioned in the concave portion 52.

Further, a predetermined gap is provided between the recess 52 and the protrusion, and the recess 52 has a recessed shape and the gap is provided, thereby preventing the recess 52 and the protrusion from coming into contact with each other.

The protruding portion may not be formed as a plurality of protruding portions 91, but may be formed as 1 protruding portion integrally connected by a plurality of protruding portions 91.

Since the protruding portion which is the 1-projection portion integrally connected as described above is easily deformed when the case 20 (more specifically, the 1 st case 23) is molded, the protruding portion and the case 20 are formed as in the present embodiment

When the (more specifically, the 1 st case 23) is formed integrally, the protruding portion is preferably provided in the form of a plurality of protruding portions 91.

(2 nd vibration damping part)

In the present embodiment, in addition to the 1 st vibration damping portion 90 described above, a 2 nd vibration damping portion 90 is provided in the vicinity of the 1 st vibration damping portion 90.

Specifically, as shown in fig. 4, a plurality of screw engagement holes 21a are formed at positions close to the 1 st side wall portion 22 of the 1 st vibration damping portion 90 having a protruding portion formed by a plurality of protruding portions 91, and the plurality of screw engagement holes 21a are formed in the 1 st surface portion 21, which is one surface portion, of the housing 20 (see fig. 1).

A plurality of metal screws 92 attached to be screwed into the screw engagement holes 21a serve as attachment members to be attached to the 1 st surface portion 21 of the housing 20.

The 2 nd vibration damping portion 90 formed by the mounting member is provided on the 1 st surface portion 21 of the case 20.

The above-mentioned plurality of screw engagement holes 21a and screws 92 are provided to the inner or outer surface of the face portion.

Here, the inner surface refers to a surface facing the inside of the housing 20, and the outer surface refers to a surface facing the outside of the housing 20.

The screw 92 is formed of a metal material such as iron or aluminum.

Since the 2 nd vibration damping portion 90 formed of the plurality of metal screws 92 attached in this manner is larger in material weight per unit than the case 20 formed of the resin material, the weight can be increased, and noise can be reduced similarly to the 1 st vibration damping portion 90.

In the above description, the case where the 1 st vibration damping part 90 employs the protruding part formed of the plurality of protruding parts 91 and the plurality of protruding parts 91 are formed so as to protrude from the 1 st surface part 21, which is one surface part, toward the inside of the housing 20 is shown, but the 1 st vibration damping part 90 may be configured as the mounting member by providing the plurality of protruding parts 91 by screwing in the same manner as the 2 nd vibration damping part 90.

Further, although the 1 st vibration damping portion 90 and the 2 nd vibration damping portion 90 are provided on the 1 st surface portion 21, the 1 st vibration damping portion 90 and the 2 nd vibration damping portion 90 may be provided on the 2 nd surface portion 25, and the 1 st vibration damping portion 90 and the 2 nd vibration damping portion 90 may be provided on both the 1 st surface portion and the 2 nd surface portion.

Since the vibration damping portion 90 is configured in advance as the mounting member in this manner, the material selection range can be increased, and therefore, the size of the vibration damping portion 90 for obtaining a desired weight can be controlled to be small, and a part of the mounting member can be omitted depending on the noise situation, thereby suppressing noise while suppressing an increase in weight to a minimum.

(3 rd vibration damping part)

In addition, in the present embodiment, a 3 rd vibration damping portion 90 is provided in addition to the 1 st and 2 nd vibration damping portions 90 described above.

Specifically, as shown in fig. 3, the 3 rd vibration damping portion 90 is provided on the 2 nd surface portion 25, which is the other surface portion, of the case 20 (see fig. 1).

As described above, the 2 nd surface portion 25 is provided with the opening portion 25a for allowing the output gear 50 to be reached from the outside, and as shown in fig. 3, the opening portion 25a includes: a cylindrical wall portion 93 as a cylindrical 1 st wall portion described later; a cylindrical 2 nd wall portion (hereinafter referred to as an opening wall portion) 25aa provided inside the housing 20 (see fig. 1) and formed along the outer periphery of the opening 25 a.

The opening 25a is provided at a position facing the output gear 50, and the output gear 50 can be brought into contact with the outside through the opening 25 a.

The 3 rd vibration damping portion 90 surrounds the opening 25a along the outer periphery of the opening 25 a.

The 3 rd vibration damping portion 90 has a cylindrical wall portion 93 provided at a position away from the opening wall portion 25aa, and the cylindrical wall portion 93 is formed to protrude from the 2 nd surface portion 25 toward the inside of the case 20 (see fig. 1).

The cylindrical wall portion 93 surrounds the opening wall portion 25 aa.

The 3 rd vibration damping portion 90 formed by the cylindrical wall portion 93 thus formed also increases the weight of the 2 nd surface portion 25, which is the other surface portion of the housing 20 (see fig. 1), at a position corresponding to the output gear 50, similarly to the 1 st and 2 nd vibration damping portions 90, and therefore, even if vibration occurs, the vibration is quickly damped, resonance or the like is less likely to occur, and noise can be reduced.

In the present embodiment, as shown in fig. 3, a plurality of ribs 93a are formed between the opening wall 25aa and the cylindrical wall 93, and the plurality of ribs 93a connect the annular opening wall 25aa extending in the circumferential direction and the annular cylindrical wall 93 extending in the circumferential direction.

By providing such ribs 93a, the weight can be increased, resonance and the like are less likely to occur, and noise can be reduced.

Further, since the provision of the ribs 93a can stabilize the structure of the housing 20, for example, can increase the bending rigidity of the housing 20, the vibration can be attenuated and the noise can be reduced.

(4 th and 5 th vibration damping parts)

Although the 1 st to 3 rd vibration damping portions 90 are the vibration damping portions 90 provided inside the housing 20 (see fig. 1), the vibration damping portions 90 are also provided outside the housing 20 in the present embodiment, and the 4 th and 5 th

vibration damping portions

90 and 90 will be described in detail below in this order.

As shown in fig. 1a, a 4 th vibration damping portion 90 (see a hatched portion) is provided at a position corresponding to the output gear 50 on the 1 st surface portion 21, which is one surface portion, of the casing 20.

The 4 th vibration damping portion 90 is formed in the form of a wall thickness increasing portion 94, the wall thickness increasing portion 94 is formed in such a manner as to increase the wall thickness toward the outside of the case 20 with respect to the basic wall thickness of the 1 st face portion 21, and the 4 th vibration damping portion 90 increases the weight and strengthens the construction, thereby reducing noise.

Further, the increased thickness portion 94 may be configured such that at least a part of the increased thickness portion 94 is included in the projection area of the range of the output gear 50 disposed in the housing 20 on the 1 st face portion 21 side, but noise can be further reduced by providing the increased thickness portion 94 up to the side wall portion 24 as in the present embodiment.

Similarly, as shown in fig. 1b, a 5 th vibration damping portion 90 (see a hatched portion) is provided at a position corresponding to the output gear 50 in the 2 nd surface portion 25, which is the other surface portion, of the housing 20.

The 5 th vibration damping portion 90 is also formed in the form of a wall thickness increasing portion 95 similarly to the 4 th vibration damping portion 90, the wall thickness increasing portion 95 is formed in such a manner as to increase the wall thickness to the outside of the case 20 with respect to the basic wall thickness of the 2 nd surface portion 25, and the 5 th vibration damping portion 90 increases the weight and strengthens the structure, thereby reducing noise.

Further, the increased thickness portion 95 may be configured such that at least a part of the increased thickness portion 95 is included in a region where a range of the output gear 50 disposed in the housing 20 is projected on the 2 nd surface portion 25 side, similarly to the increased thickness portion 94, but the noise can be further reduced by providing the increased thickness portion 95 up to the side wall portion 24 as in the present embodiment.

The wall thickness of the increased wall thickness portion 94 and the increased wall thickness portion 95 is determined in consideration of the degree of reduction in noise, and is preferably increased by 20% or more with respect to the basic wall thickness.

By comparing the noise state of the rotating device not provided with the 1 st to 5 th vibration damping units 90 as described above, it is possible to confirm that the sound pressure can be reduced by 1dB or more for the sound at the frequency at which the sound volume is maximized.

In the present embodiment, the 5 st vibration damping portions 90 of 1 st to 5 th are provided, but not all of the 5 vibration damping portions 90 are necessarily provided.

For example, in the parts used in vehicles such as automobiles, weight reduction in grams is sometimes required from the viewpoint of energy saving and the like, and therefore, some of the vibration damping portions 90 may be omitted in consideration of the balance between the sound attenuation degree and the weight increase.

(embodiment 2)

Fig. 5 is a diagram for explaining embodiment 2, and embodiment 2 will be explained below with reference to fig. 5.

The basic configuration of embodiment 2 is also the same as that of embodiment 1, and differs only in the configuration of the 1 st vibration damping section 90.

Therefore, the following description mainly deals with portions different from embodiment 1, and the description of portions identical to embodiment 1 is omitted as appropriate.

Fig. 5 (a) is a perspective view of the inside of the 1 st case 23, fig. 5 (b) is a perspective view showing the mounting member 91 'constituting the vibration damping part 90 of embodiment 2 obtained by modifying the 1 st vibration damping part 90 of embodiment 1, and fig. 5 (c) is a perspective view showing a state where a plurality of mounting members 91' are mounted on the 1 st case 23.

As shown in fig. 5 (a), the 1 st surface 21 of the 1 st case 23 is provided with a plurality of rod-shaped projections 21b, and the plurality of rod-shaped projections 21b are formed to project toward the inside of the case 20 (see fig. 1).

As shown in fig. 5 (b), a plurality of press-fitting holes 91a 'into which the rod-like projections 21b are press-fitted are provided in a crescent-shaped mounting member 91' made of a metal material constituting the vibration damping part 90.

Therefore, by press-fitting the rod-shaped protrusion 21b into the press-fitting hole 91a ' of the mounting member 91 ' and mounting the mounting member 91 ' on the 1 st surface portion 21, the vibration damping portion 90 formed as a protruding portion cantilevered to the 1 st surface portion 21 can be realized, as in the 1 st vibration damping portion 90 (see fig. 4) of embodiment 1.

Further, the additional weight can be adjusted by setting the number of mounting pieces of the mounting member 91 'to a plurality as shown in fig. 5 (c) or by reducing the number of mounting pieces of the mounting member 91' as shown in fig. 5 (a).

Therefore, an appropriate weight can be added in consideration of the balance between the sound deadening effect and the weight increase.

Further, since the outer shape of the mounting member 91 'is similar to the outer shape obtained by connecting the plurality of convex portions 91 of embodiment 1, the mounting member 91' can be accommodated in the concave portion 52 (see fig. 2) of the output gear 50 described in embodiment 1 without coming into contact with the output gear 50.

The rotary device 10 as described above is used in an air conditioning system of a vehicle such as an automobile, for example, and the following description will briefly discuss a case of being used in the air conditioning system of the vehicle.

Fig. 6 is a schematic diagram for explaining an air conditioning system 100 including the rotary device 10 according to the embodiment, and fig. 7 is a diagram showing a vehicle including the air conditioning system 100 of fig. 6.

As shown in fig. 6, the air conditioning system 100 includes a fan 101, an evaporator 102, a heater 103, and a damper 104, which are disposed in a head portion FR (see fig. 7) of the vehicle.

More specifically, a fan 101 is disposed on the suction port 100a side of the air conditioning system 100, and an evaporator 102 for cooling air sent from the fan 101 is disposed on the downstream side in the air flow direction.

Further, a heater 103 is disposed on the downstream side of the evaporator 102 in the air flow direction, a damper 104 is disposed between the evaporator 102 and the heater 103, and the damper 104 adjusts the temperature of the air to an appropriate temperature by controlling the supply amount of the air flowing from the evaporator 102 side to the heater 103 side.

The air adjusted to the appropriate temperature is supplied into the vehicle interior from an outlet port provided in the vehicle interior via a duct or the like, and in the air conditioning system 100 described above, for example, the rotary shaft 104a of the damper 104 is connected to the engagement portion 51 of the output gear 50 of the rotary device 10 (see fig. 1).

Therefore, as described above, the rotation of the damper 104 is controlled by the rotating device 10 (see the double-headed arrow in fig. 6), and the damper 104 is brought into a predetermined state.

The above is merely an example of the rotary device 10 in the air conditioning system 100, and for example, the air conditioning system 100 may be further configured to switch the air flow path (duct path) between a case where air in the vehicle interior is circulated and a case where air outside the vehicle is introduced into the vehicle interior, and a damper is also provided in the switching portion.

Therefore, the rotary device 10 can be suitably applied also to a case where it is used to control a damper provided in the switching portion.

The present invention has been described above based on the embodiments, but the present invention is not limited to the embodiments.

In the above embodiment, the sensor 70 is disposed to detect the rotation angle of the output gear 50, but the detection of the rotation angle is not limited to the detection of the rotation angle of the output gear 50.

For example, when the relationship between the rotation angle of 1 gear of the plurality of transmission gears 40 and the driving state of the damper, not shown, is obtained, the driving of the damper, not shown, can be controlled by detecting the rotation angle of the gear and controlling the rotation of the motor 30 based on the rotation angle.

Therefore, the sensor 70 for detecting the rotation angle may be disposed to detect the rotation angle of any one of the transmission gears 40.

In the above embodiment, the sensor 70 uses a rotor type resistance position sensor, but the sensor 70 does not necessarily need to be a rotor type resistance position sensor, and may be a noncontact rotor type position sensor.

However, since the resistance-type position sensor has a structure in which the conductive brush and the resistor can be reliably brought into physical contact with each other, detection failure or the like due to the influence of vehicle vibration is less likely to occur, and therefore, a rotor-type resistance-type position sensor is preferably used as the sensor 70.

Further, the vibration damping portion may be provided in the case so that the center of gravity of the 1 st or 2

nd face portion

21 or 25 of the case 20 is located closer to the vibration damping portion than the center of the 1 st or 2

nd face portion

21 or 25.

Here, the center of the 1 st or 2

nd surface portion

21 or 25 is defined as a position of the 1 st or 2

nd surface portion

21 or 25 corresponding to an intersection point of diagonal lines of the 4 attaching portions A, B, C, D of the case 20 in the thickness direction of the case 20.

The above-described embodiment configuration of the vibration damping portion can be suitably applied in order to bring the center of gravity close to the vibration damping portion.

The 1 st vibration damping portion 90 may be provided on the 2 nd surface portion 25.

Further, by providing the 1 st vibration damping portion 90 as a weight on the 1 st face portion 21 and/or the 2 nd face portion 25, the portion of the 1 st face portion 21 and the 2 nd face portion 25 where the 1 st vibration damping portion 90 is provided can be made heavier than the other portions.

Further, by providing the 1 st vibration damping portion 90 on the 1 st and/or 2

nd face portions

21, 25, the bending stiffness (young's modulus) of the 1 st and 2

nd face portions

21, 25 in which the 1 st vibration damping portion 90 is provided may be made larger than the bending stiffness (young's modulus) of the other portions.

The 1 st vibration damping portion 90 may be provided near the fitting portion E or the fitting target portion F with respect to the center of the housing 20, or may be provided adjacent to the fitting portion E or the fitting target portion F.

Here, the center of the case 20 refers to an intersection of diagonal lines of the 4 mounting portions A, B, C, D of the case 20 in the thickness direction of the case 20.

The motor may further include, for example, a stator, a rotor, a commutator, a brush, and a holder for holding the brush, which are not shown.

As described above, it is obvious that various modifications can be made in the present invention without departing from the scope of the invention, and such modifications obtained by making various modifications without departing from the scope of the invention are also included in the scope of the invention, and these modifications will be apparent to those skilled in the art from the description of the claims.

Claims

1. A rotary device, comprising:

a motor;

a plurality of gears including an output gear that outputs rotation of the motor to the outside; and

a housing accommodating the plurality of gears and the motor;

the housing includes:

1 st face;

a 2 nd face portion that is opposite to the 1 st face portion and is provided separately from the 1 st face portion,

at least one of the 1 st surface part and the 2 nd surface part has an opening part facing the output gear, a plurality of 1 st vibration damping parts, and a plurality of 2 nd vibration damping parts,

the 1 st vibration damping portion is a protruding portion extending in a direction intersecting a rotation axis of the motor,

the plurality of 2 nd vibration damping portions surround the opening portion,

the plurality of 2 nd vibration damping portions are respectively projections provided to project from the at least one face portion,

the 2 nd vibration damping portion is longer than the 1 st vibration damping portion in a rotation axis direction of the gear,

the plurality of protruding portions are respectively mounted with a mounting member.

2. The rotating apparatus according to claim 1,

the plurality of projections each have a rod-like shape,

the plurality of mounting members are mounted on the at least one face portion via the protruding portions, respectively.

3. The rotating apparatus according to claim 1 or 2,

the plurality of mounting members are screws that are mounted by being threadedly engaged with threaded engagement holes formed at the protruding portions, respectively.

4. The rotating apparatus according to any one of claims 1 to 3,

the 1 st vibration damping portions are provided on an inner surface of the 1 st face portion,

the weight of the 1 st face portion is increased by the plurality of 1 st vibration damping portions.